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Finding the Fourth Proportional to 143,967.60, 215,951.40 and 86,886.90

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Solution

The fourth proportional to 143,967.60, 215,951.40 and 86,886.90 is: 130,330.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,967.60 : 215,951.40 = 86,886.90 : x
  2. Step 2: Convert to fraction form
    143,967.60/215,951.40 = 86,886.90/x
  3. Step 3: Cross multiply
    143,967.60x = 215,951.40 × 86,886.90
  4. Step 4: Simplify right side
    143,967.60x = 18,763,347,696.66
  5. Step 5: Solve for x
    x = 18,763,347,696.66/143,967.60
  6. Step 6: Final answer
    x = 130,330.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.